JP3313027B2 - Method and apparatus for biological deodorization of anaerobic treatment tank in sewage treatment equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewage treatment apparatus for treating household wastewater or human wastewater containing crushed garbage, and more particularly to a method and apparatus for biologically deodorizing odorous gas generated in an anaerobic treatment tank. is there.

[0002]

2. Description of the Related Art In a conventional biological deodorization method, the odor of a sewage treatment apparatus is sucked into a biological deodorization apparatus installed outside an anaerobic treatment tank, and the intake air is introduced into the reaction tank to make a lean odor. The deodorization is carried out in two stages, that is, the second step of introducing a dilute odor into the reaction tank, further diluting it and taking it out of the reaction tank.

[0003]

When a gas containing malodorous components such as hydrogen sulfide, ammonia, amines, methyl mercaptan, methyl sulfide, and methyl disulfide comes in contact with water, the malodorous component is converted to water. The malodorous component dissolved and dissolved in water comes in contact with microorganisms such as sulfur oxidizing bacteria, sulfuric bacteria, nitric acid bacteria and nitrite bacteria, and the microorganisms decompose the malodorous component and use it as an energy source. The structure has a structure in which water is sprinkled from a water sprinkling pipe and the odorous gas passes along the carrier. Further, polypropylene fibers and porous ceramics are used as the porous carrier.

The present invention makes use of such biological deodorization to prevent the expansion of sewage treatment equipment by installing a conventional biological deodorization apparatus, and to exhibit a deodorizing function efficiently with a simpler method and apparatus. An object of the present invention is to provide a method and an apparatus for biological deodorization of an anaerobic treatment tank in a possible sewage treatment apparatus.

[0005]

In order to solve the above-mentioned problems, a method of the present invention is directed to a sewage treatment apparatus having an anaerobic treatment tank, wherein a net for preventing carrier outflow is provided below the vicinity of the water surface of the anaerobic treatment tank. The porous carrier is filled from the upper portion of the carrier outflow preventing mesh to above the water surface, and odor components generated from the inside of the anaerobic treatment tank are deodorized by microorganisms generated in the packed layer of the porous carrier. It is characterized by the following. Further, the method of the present invention is characterized in that a carrier outflow preventing net is laterally provided on the water surface of the anaerobic treatment tank, and an upper portion of the carrier outflow preventing net is filled with a porous carrier. is there.

[0006] The porous carrier used in the method of the present invention is characterized by having water absorption and water retention.

Further, the present invention relates to a sewage treatment apparatus having an anaerobic treatment tank, wherein a net for preventing carrier outflow is provided horizontally below the water surface of the anaerobic treatment tank, and the net for preventing carrier outflow is provided. The porous carrier is filled from above to above the water surface. Further, the apparatus of the present invention is characterized in that a carrier outflow preventing net is horizontally provided on the water surface of the anaerobic treatment tank, and a porous carrier is filled in an upper portion of the carrier outflow preventing net. is there.

[0008] The porous carrier used in the device of the present invention is characterized by having water absorption and water retention.

Therefore, the method and the device of the present invention are capable of preventing the odor gas in the sewage in the anaerobic treatment tank from rising above the water surface, but at the upper part of the carrier outflow preventing net placed below the water surface or near the water surface. The porous carrier is filled above the water surface or above the water surface, and the malodorous gas passes along the porous carrier. Porous carriers are easily absorbed in nature due to their nature.When a carrier outflow prevention net is laid horizontally on the water surface, and when a carrier outflow prevention net is laid below the water surface, water is always absorbed from the water. Because it is absorbed, it is not necessary to spray water on the porous carrier, and microorganisms such as sulfur oxidizing bacteria, sulfur bacteria, nitric acid bacteria, nitrite bacteria inhabit and propagate in the fine pores of the porous carrier, and a large amount of microorganisms adhere The odorous components such as ammonia, amines, and hydrogen sulfide are decomposed by the microorganism, and are absorbed and multiplied as an energy source. Accordingly, the malodorous components decomposed become odorless.

The porous carrier used in the method and apparatus of the present invention is characterized in that it has water absorption and water retention, so that it has a large water absorption power from the surface of the anaerobic treatment tank or from the water. In the wet state, the malodorous component in the gas is dissolved in the retained moisture and the state becomes the same as when water is sprinkled, and the deodorization and action are performed more efficiently.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the method and the apparatus of the present invention, in which a carrier outflow prevention net is horizontally arranged below a water surface, and FIG. It is a block diagram in the case. In the figure, reference numeral 1 denotes an anaerobic treatment tank of the sewage treatment apparatus, and a carrier outflow preventing net 2 is provided horizontally below or near the water surface in the anaerobic treatment tank 1. The carrier outflow preventing net 2 may be stretched over the entire surface below or near the water surface, or may be partially stretched.

The porous carrier 3 is placed on the carrier outflow preventing net 2.
Is filled to above the water surface. The porous carrier 3 is made of a polyurethane foam having a cell number of 20 to 50 cells / inch, a size of 10 to 20 mm square, and an apparent specific gravity of 0.95 to 1.1. The porous carrier 3 is not limited to the polyurethane foam as long as the granular material having fine pores and the pores communicating with each other desirably has water absorption and water retention properties. Fibers, resin foams, porous stones and the like may be used.

The porous carrier 3 carries microorganisms such as sulfur oxidizing bacteria, sulfur bacteria, nitric acid bacteria, nitrite bacteria and the like attached when the malodorous gas passes through in combination with the water absorbed in the anaerobic treatment tank 1. .

Reference numeral 4 denotes a sewage inflow pipe for introducing sewage from sewage or the like. 5 is an outflow pipe of the treated water.

[0015]

According to the present invention, in the anaerobic treatment tank, the malodorous gas is decomposed by microorganisms that inhabit and propagate on the porous carrier, becomes odorless, and is exhausted out of the anaerobic treatment tank. And it is not necessary to sprinkle water by providing a watering device as in the prior art on the porous carrier, and it is automatically made by absorbing water in the anaerobic treatment tank, so there is no need to separately provide a biological deodorizing device outside the tank, equipment The cost can be reduced and the device can be made compact.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of an apparatus according to the method of the present invention.

FIG. 2 is a configuration diagram showing an embodiment of an apparatus according to the method of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Anaerobic treatment tank 2 Carrier outflow prevention net 3 Porous carrier 4 Sewage inflow pipe 5 Outflow pipe

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification code FI C02F 3/10

Claims (6)

(57) [Claims] In a sewage treatment apparatus having an anaerobic treatment tank, a carrier outflow preventing net is horizontally provided below a vicinity of a water surface of the anaerobic treating tank, and the carrier outflow preventing net is placed above the water surface. The anaerobic treatment tank in the sewage treatment apparatus, characterized in that the porous carrier is filled up to the top, and the odor components generated from the inside of the anaerobic treatment tank are deodorized by microorganisms generated in the packed layer of the porous carrier. Biological deodorization method. 2. A carrier outflow preventing net is laterally provided on a water surface of the anaerobic treatment tank, and a porous carrier is filled in an upper portion of the carrier outflow preventing net.
A biological deodorization method for an anaerobic treatment tank in the sewage treatment apparatus described in the above. 3. The biological deodorization method for an anaerobic treatment tank in a sewage treatment apparatus according to claim 1, wherein the porous carrier has water absorption and water retention. 4. In a sewage treatment apparatus having an anaerobic treatment tank, a carrier outflow preventing net is horizontally provided below a vicinity of a water surface of the anaerobic treating tank, and the carrier outflow preventing net is placed above the water surface. A biological deodorization apparatus for an anaerobic treatment tank in a sewage treatment apparatus, wherein a porous carrier is filled up to the top. 5. A carrier outflow preventing net is horizontally provided on the water surface of the anaerobic treatment tank, and a porous carrier is filled in an upper portion of the carrier outflow preventing net.
A biological deodorizing apparatus for an anaerobic treatment tank in the sewage treatment apparatus described in the above. 6. The biological deodorization apparatus for an anaerobic treatment tank in a sewage treatment apparatus according to claim 4, wherein the porous carrier has water absorption and water retention.